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A.S.G.A.P Indigenous Orchid Study Group A.S.G.A.P INDIGENOUS ORCHID STUDY GROUP Group Leaders: Don and Pauline Lawie P.O. Box 230, BABINDA 4861 Phone: 0740 671 577 Newsletter 37 December. 2001 Here we are back to orchids, although Don's report on Myall Park did create much interest. Also the reaction to the piece on Cymbidium canaliculatum encouraged us to chance our arm on this venture into colour pictures. It is not surprising that it is the favourite orchid of many people. I take responsibility for three of the photographs; for the one of the plant on the top right we thank Cherree Densley, the editor of Growing Australian, the Australian Plant Society - Victoria, newsletter. The photograph was taken in the upper reaches of the Darling River. What do you reckon the tree is? The photo top left is of a very pale specimen on a fabulous plant in a garden in Surat, South Ea~t_~ueensland.Surat-is_onAhe Balonne_River_which_al~~eeds_int~~the MurrayIOarling system. The photographs on the bottom, showing two more colour variations, were taken at a van park at lnnot Hot Springs, a small town west of Ravenshoe, on the other side of the Divide from Innisfail. I understand the plants came from the local area which would place them in the headwaters of the WalshIMitchell system flowing into the Gulf, or the Herbert flowing east into the sea. The dark form is sometimes known as var. sparkesii and also the Black Orchid. None of the plants we have observed in the north have had seed pods, yet in the south of the State, almost every plant seen had pods. Cherree also sent the following notes, calculated to turn many an eye green with envy: "Orchids have become a special adjunct to the owning of and exploring 187 acres of wetldry sclerophyll forest in the SW of Victoria. It is a 'covenanted' (can NEVER be cleared) block of solid bushland with rocky ridges along which orchids flourish. I have written about my block before. At this time of the year (October) I have found quite a few large colonies of Chiloglottis valida (Common Bird Orchid). There is nothing common about this plant. The clumps are flowering in shades of pure green through to a mix of green and purplish brown to deep shining mahogany. Other colonies of orchids include literally thousands of Pterostylis pedunculata (Maroonhood) which must be one of the longest flowering orchids - clumps were well in flower in mid-August and lots of flowers can still be seen in the last week of October. I was also fortunate, this year, to find huge clumps of Corybas dilatatus (Veined or Stately Helmet Orchid). I had not seen them before on my block. I was photographing Clematis microphylla - a new find here (I am now up to 320 species of plants) - and was actually standing on the Corybas. When I realised what I was standing on - I was checking my ankles for leeches (!) - I could not not stand on them; I was surrounded by probably thousands. The greenhoods were also in this area. "New orchids on my Mt Clay block for this year were three huge clumps of Donkey Orchids, Diuris corymbosa - one clump had 24 stems. (I had only seen one stem of this Newsletter 37 Page 2 orchid before, but in a different area.) On the north ridge there are, flowering at the moment, Caladenia tentaculata (Mantis or Green Comb Spider Orchid) - there probably are hundreds - Caladenia carnea (Pink Fingers), Caladenia gracilis (Musky Caladenia), Glossodia major (Waxlips), Leptocerus menziesii (Hare or Rabbit Orchid) - there are hundreds of large leaves, but only the one or two flowers per clump. I have read that these orchids respond to fires, but it is a long time since my block had a fire - about 30 years ago. I don't like to think of a fire through there; too many mammals and birds would be destroyed. (I have a listing of 85 different birds and 15 different mammals, not to mention the bats.) Other orchids just now appearing are many spikes of the Cinnamon Bells and Onion Orchids, Gastrodia sp and Mcrotis sp. "I also searched in a piece of bushland nearby to my block, about 2kms further on, last week and found -for the first time - Large Flying Duck orchids, Caladenia major. This was a read thrill, just the half dozen growing in a wet white sandy swamp area along where a track had been cut through. Also in this area were Bearded orchids, probably Calochilus robertsonii and heaps of Sun orchids - but these were not flowering; we have had rain nearly every day with overcast conditions, and as you know, these wonderful orchids need a few hours of mid- day sun to show off. In one area of clay loam, there were eight spikes (20 flowering buds on each) of Thelymjtra aristata (Great Sun Orchid). I really had a great day orchid hunting." TERRESTRIAL ORCHIDS (From Don) Australian Plants No 167, the current issue, features a comprehensive article on the characteristics of terrestrial orchids and methods of cultivating them. The author is Ales Blombery, long term authority on Native Plants, and co-author with Betty Maloney of Growing Australian Orchids. This book costs just under $20 and should be in the library of every grower of our native orchids. The piece in Australian Plants is comprehensive and authoritative. Blombery knows his stuff! Terrestrials far outnumber epiphytes in Australia, but their mainly small size and retiring habits result in the showy epiphytes getting the better recognition -just like we humans! The fragile beauty and the short time span of the individual flowers of Caladenias and Dipodiums are offset by the size of their colonies and the time of flowering from first to last in the colony. Reports such as "the flowers were so numerous that I couldn't help but step on them" give us an idea of the wonders in store for searchers of our terrestrial orchids in the wild. They CAN be grown at home and the "AP" article tells us how. Bill Payne, the Editor, is very keen to have reports from people who have grown Sun Orchids (Thelymitra spp).They are not an item for we of the lowland wet tropics but readers who have grown Thelymitra in particular are urged to write to Bill with details of their successes or failures and the methods they have used. The June, 2001, edition of The Orchadian has an article entitled The Genus Dockrillia, and its use in Hybrids, which says, inter alia, that the genus was established in 1981 by Friedrich Gustav Brieger; that "the treatment featured a large number of errors and omissions" and that it "was basically ignored by the botanical community". The article goes on to say that the genus was resurrected in 1996 and "this time it has been widely accepted in botanical and horticultural circlesJJ. Newsletter 37 Page 3 After seeing the use of the genus in Lavarack, Harris, and Stocker's book, Dendrobium and its Relatives, then reading this article, I decided I had better learn which plants were now Dockrillia, and why, only to be told that the new genus has not been accepted after all. The splitters are at it again in the September issue of The Orchadian, splitting off two Bulbophyllum species into a new genus. I sometimes wonder why it is that I belong to ANOS as the magazine is a bit indigestible, then I come across a piece by Gerry Walsh, this time A bit about Sarcochilus australis: "While stumbling about in a likely gully, you may not see a single specimen of S. australis. Within metres you could be staring dumb-stricken at hundreds of plants. And while you're doing an Indian rain-dance at your long overdue success you may take a couple of steps too far and lose sight of the lot in a blink of an eye." (Sarcochilus australis is one of only two epiphytic orchids which grow in Tasmania.) I'm sure we have all experienced the excitement of seeing similar fabulous orchid sights. What Gerry does not say is how far he travels to gain this experience. I think the strength of the orchid love affair can be gauged by the effort one is prepared to expend in the search. In October I had a 13 hour expedition to mount Lewis, up in the hills west of Port Douglas. This included six hours driving (though I did only two hours of that, to and from my pick-up point) and I arrived home long after dark. I was rewarded by seeing some plants for the first time - Bulbophyllum newporfii, B, wadsworthii, Cadetia taylori, Liparis bracteafa and Octarrhena pusilla. Additionally I learned that there is a Dendrobiumjonesii magnificum, and how magnificent; there were masses of them on a cliff face in glorious Rower, and plenty of plants in trees too. D. agrostophyllum with its pure yellow flowers grew in such profusion that one did not dare rain-dance . The plants grew up in the trees, all over the understorey shrubs and across the ground; it was impossible to see where plants began and ended and we placed our feet with care. Had 1 not been led to the spot, 1 probably would have missed the lot. In another area the abundance of flowers on B. newportii was a sheer delight. We have to travel a fair way to see those plants which only grow at altitude, but we are not averse to pulling on the jungle clobber to scour the scrub nearer to home to look at new populations of more familiar plants.
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